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Application :

 Algae Removal Artificial Lake Water Treatment  Water repellent organisms and algae removal applications

When the high frequency vibration of power ultrasonic wave acts on water, it will produce the following effects: Mechanic effect: Medium point alternately expands and shrinks during the propagation process, and the positive and negative pressure changes produce mechanical effect.

Thermothrrmal effect:  High frequency vibration can cause the medium temperature of transmitting soun wave to rise and produce the thermal effect of absorb! ng energy.

Cavitation effect: High frequency vibration in liquid, propagation process will cause alternate expansion and contraction of liquid medium, alternate change of positive and negative pressure. When negative pressure reaches and exceeds the binding force between liquid molecules, the liquid will be torn apart, resultingin local vacuum microbubble nucleus. Microbubble nucleus will expand, close and oscillate instantaneously with the action of ultrasound. At a certain energy threshold, the bubble will collapse, and produce instantaneous high. V^lolOOO atmospheric shocks and microjets.

Pyrolysis and free radical effect: Watervapor produced by vacuum micronucleus bubbles splits and chain reacts at high temperature and high pressure to produce free radical OH. When the bubbles collapse, OH enters the water. • OH is a super oxidant. For organic substances in ultrasonic field, including important life macromolecule substances such as protein and nucleic acid, chemical reactions can take place rapidly under the action of cavitation. Its mechanism includes pyrolysis reaction and oxidation reaction of free radicals. Generally speaking, hydrophobic and volatile organic compounds can enterthe cavitation bubble for pyrolysis; hydrophilic and volatile organic compounds can oxidize with OH at the gas-liquid interface of the cavitation bubble orin aqueous solution.

Study have shown that ultrasound has the above-mentioned effects in water and can obviously resist algae growth under specific conditions.

Low Frequency Ultrasound: Low Energy Ultrasound has a strong control effect on the most harmful cyanobacteria in water, and also has a good inhibition effect on green algae and diatoms. Frequency 20-40 kHz and power density 0.2-0.5 W/cm2 were better than those of green algae and diatoms, and Anabaenaspp. was better than that of Microcystis spp.

High frequency ultrasound:  When the frequency of ultrasound is 580 kHz, the concentration of free radicals in water reaches a peak, and the removal rate of Microcystis in water is the highest, which indicates that the removal of Microcystis by oxidation is more effective.

Working mode: Gap work is more effective, working 10-15 times a day, 5-15 minutes each time has better inhibition effect on algae.

Studies have shown that under certain conditions, ultrasound can also evidently eliminate aquatic organisms in the sound field area, killing aquatic organisms eggs and larvae.

Ultrasound parameters: When the frequency is 20-30 kHz and the power density is 0.3-0.5 W/cm2, the effect of repelling and killing aquatic organisms, especially marine organisms, is obvious.

Condyle treatment time: about 10-30 seconds.

Temperature environment: water temperature (30°C—45°C) is the best.

Ourcompany has developed a series of ultrasonic products with the above effects in combination with market demand.

Separate transducer